Yoghurt maker



FIG. 1 is a right side elevational view of a yoghurt maker showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a bottom, rear perspective view thereof; and,

FIG. 5 is a top, front perspective view thereof. 

The ornamental design for a yoghurt maker, as shown. 